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Finding the Fourth Proportional to 536,423.49, 739,658.52 and 390,972.20

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Solution

The fourth proportional to 536,423.49, 739,658.52 and 390,972.20 is: 539,100.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    536,423.49 : 739,658.52 = 390,972.20 : x
  2. Step 2: Convert to fraction form
    536,423.49/739,658.52 = 390,972.20/x
  3. Step 3: Cross multiply
    536,423.49x = 739,658.52 × 390,972.20
  4. Step 4: Simplify right side
    536,423.49x = 289,185,915,114.85
  5. Step 5: Solve for x
    x = 289,185,915,114.85/536,423.49
  6. Step 6: Final answer
    x = 539,100.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.